CN107442264B - The wet split recovery process of valuable component in a kind of waste printed circuit board - Google Patents

The wet split recovery process of valuable component in a kind of waste printed circuit board Download PDF

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Publication number
CN107442264B
CN107442264B CN201710486372.3A CN201710486372A CN107442264B CN 107442264 B CN107442264 B CN 107442264B CN 201710486372 A CN201710486372 A CN 201710486372A CN 107442264 B CN107442264 B CN 107442264B
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wet
circuit board
printed circuit
waste printed
adjustable range
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CN107442264A (en
Inventor
贺靖峰
段晨龙
姚亚科
何亚群
戴国夫
王海锋
王雨阳
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B3/00Destroying solid waste or transforming solid waste or contaminated solids into something useful or harmless
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B5/00Operations not covered by single other subclass or by a single other group in this subclass
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/82Recycling of waste of electrical or electronic equipment [WEEE]

Abstract

The invention discloses a kind of wet split recovery process of valuable component in waste printed circuit board, comprising: step 1 disassembles waste printed circuit board to obtain waste printed circuit board bare board;Step 2 removes solder to waste printed circuit board bare board;Step 3 will remove the successively wet process coarse crushing and wet process is fine crushing obtains waste printed circuit board particle of the waste printed circuit board bare board after solder;Waste printed circuit board particle screening is classified by step 4, obtains the material that particle size fraction is -1+0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm;The material that particle size fraction is -1+0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm is fed distinct device sorting by step 5 respectively, respectively obtains metal concentrate and nonmetallic enrichment body;Metal concentrate and nonmetallic enrichment body are separately recovered step 6.Have the beneficial effect that using the metal component and nonmetallic ingredient in a variety of physical separation technologies separation different grain size grade material, obtained metal concentrate and nonmetallic enrichment body product quality preferably, the rate of recovery it is higher, environmental pollution is small.

Description

The wet split recovery process of valuable component in a kind of waste printed circuit board
Technical field
The present invention relates to valuable group in Disposal of Electronic Wastes recycling field more particularly to a kind of waste printed circuit board The wet split recovery process divided.
Background technique
In recent years, Electronic products manufacturing industry is being developed with stable speed always, with the continuous progress of science and technology and people Continuous improvement of the class to electronic product functional requirement, the life cycle shortened of electronic product, resulting electronic waste Object is more and more.It is counted according to European Union's related data, electron wastes growth rate during 2008 to 2014 is always maintained at It is 4 times of common rubbish 11% or so.It is pointed out in " the global electronic garbage monitoring in 2014 " of United Nations University's publication, The global raw 41,800,000 tons of electronic wastes of common property in 2014, however only 16% electronic waste is recycled or is reused. Contain the electronic component that can largely continue to use, the metals such as the higher copper of grade, aluminium, iron, gold, silver in discarded printed circuit boards With precious metal material and the nonmetallic materials such as glass and plastics, there is significant resourceization regeneration value.For example, 1 ton of print The gold contained in printed circuit board is up to more than 80 grams.Important component of the printed circuit board as electronic product, due to its material Material composition and combination are extremely complex, and liberation degree of minerals is small, and metal component and nonmetallic ingredient are not easy to realize separation, synthesis Recovery processing is always a considerably complicated problem.
The technology of recycling waste printed circuit board is broadly divided into physiochemical mutagens technology, pyrometallurgy and hydrometallurgical etc. three at present Kind technology.Pyrometallurgy recycles that waste printed circuit board is high-efficient, simple process, but the environmental pollution generated is larger.Hydrometallurgy energy Consume that small, synthetical recovery is high-efficient, but process flow is generally more complex, the more difficult recovery processing of the acid waste liquid of generation.Physiochemical mutagens Technology is environmentally protective, recovery efficiency is high, simple process, but due to mostly using the discarded electricity of single one physical sorting technology recycling greatly at present Road plate, sharpness of separation is lower, so that the resultant metal grade after sorting is difficult to reach the demand of relevant industries, while causing many In nonmetallic enrichment body, eventually leading to valuable component in waste printed circuit board cannot effectively be recycled for metal component mispairing.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide the wet split of valuable component recycles work in a kind of waste printed circuit board Skill, to solve the problems, such as that applicable material size narrow range, recovery efficiency caused by existing single one physical recovery technology are lower.
The purpose of the present invention is mainly achieved through the following technical solutions:
The wet split recovery process of valuable component, mainly comprises the steps that in a kind of waste printed circuit board
Step 1 disassembles waste printed circuit board, the waste printed circuit board bare board after being disassembled;
Step 2 carries out removing solder to waste printed circuit board bare board;
Step 3 will remove the waste printed circuit board bare board after solder and successively carry out wet process coarse crushing and wet process is fine crushing, be discarded Circuit board particle;
Waste printed circuit board particle is fed Wet multi-stage vibrating screen progress sieve classification by step 4, and obtaining particle size fraction is -1+ The material of 0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm;
Particle size fraction is fed variable diameter water Jie for the material of -1+0.5mm, -0.5+0.25mm and -0.074mm by step 5 respectively Matter sorting bed, waterpower shaking table and Falcon centrifugal classifier are sorted;The material that particle size fraction is -0.25+0.074mm is fed Flotation device is sorted;It is sorted, respectively obtain metal concentrate and nonmetallic enrichment body;
Step 6 recycles metal concentrate that each equipment sorts and nonmetallic enrichment body respectively.
Present invention process individually sorts after waste printed circuit board particle is carried out multilayer sieve classification, compared with prior art, The advantages of present invention is using individually sorting: first, adaptable screening installation can be selected for a relatively narrow particle size fraction material, Influence of the material size to sharpness of separation is reduced, to strengthen material in screening installation by density separation;Second, it selects and adapts to The relatively narrow particle size fraction material of screening installation, can play the advantage of each screening installation to large extent, various kinds of equipment have one compared with Ideal material size range, when pan feeding is within this particle size range, separating effect is preferable.
Further, the component disassembled waste printed circuit board in the step 1 passes sequentially through component point Class, component performance detection carry out classification processing.
The component that dismantling waste printed circuit board obtains includes resistance, capacitor, inductance, diode, transistor, relay, collection It is whether intact by using the function of multimeter detection these components at circuit etc., the intact component of function is classified as Recycling component;By function damage and component containing harmful substances such as polybrominated biphenyls, polychlorinated biphenyls be classified as it is toxic Harmful component;Some functions are damaged but the higher component of tenor is classified as the high component of tenor, are such as inserted The content of aluminium and copper is higher in slot;Disassemble obtained component be divided into the high component of recycling component, tenor and Poisonous and harmful component, wherein recycling component can be used in the maintenance of used equipment and the production of new component;To metal The high component of content carries out smelting processing, to recycle valuable metal therein;And poisonous and harmful component is then useless according to solid Object pollutes the processing of the relevant laws and regulations such as environment anti-therapy.
Further, in the step 2, the scruff obtained to removing solder is successively slightly refined and is refined, and is met The solder of national standard.
Further, in the step 3, using wet type bi-fluted roller type crusher and wet type impact-hammer type disintegrator to removing Waste printed circuit board bare board after solder successively carries out wet process coarse crushing and wet process is fine crushing.
The present invention carries out wet process coarse crushing and wet process is fine crushing can effectively reduce dust and toxic and harmful gas in shattering process Generation.
Further, the crushing circuit of the wet process coarse crushing and wet process composition fine crushing is two-stage wet method crushing circuit.
In shattering process, the every reduction of the granularity of material is once a reduction stage, and the form of the composition of reduction stage has: 1) single One crushing operation;2) pre-screening-crushing operation;3) it is crushed-check screening operation;4) pre-screening-is crushed-check screening work Industry;The present invention is fine crushing using wet process coarse crushing and wet process, because referred to herein as two-stage wet method is broken;Two-stage wet method of the present invention is broken It is broken relative to single hop wet crushing process, two-stage wet method is broken to have that crushing efficiency is high, good (product granularity is more equal for product characteristic It is even, cross degree of grinding it is smaller), low energy consumption and the higher advantage of sorting index.
Further, the waste printed circuit board grain diameter obtained after the wet process coarse crushing is less than 20mm, and the wet process is fine crushing The waste printed circuit board grain diameter obtained afterwards is less than 1mm.
Step 3 of the present invention finally obtains waste printed circuit board grain diameter less than 1mm after wet process is fine crushing, is to make it In metal component dissociated as far as possible with nonmetallic ingredient, to improve the sorting index of crushed product, be subsequent further sorting It creates favorable conditions.
Further, in the step 3, the volume for the water being added during wet process coarse crushing accounts for wet type bi-fluted roller type crusher The volume of the 10%~20% of crusher chamber volume, the water being added during wet process is fine crushing accounts for wet type beater type crushing chamber of crusher The 20%~30% of volume.
The present invention carries out that broken crushing effect is good using wet process, effectively reduces the generation of dust and pernicious gas.
Further, in the step 4, the screen size of the Wet multi-stage vibrating screen be successively from top to bottom 1mm, 0.5mm, 0.25mm and 0.074mm;In the Wet multi-stage vibrating screen vibrating motor shake frequency be suitable for adjustable range be 900~ 1500 times/min, amplitude is suitable for that adjustable range is 4~8mm, and vibrating direction angle is suitable for that adjustable range is 40 °~60 °.
Wet multi-stage vibrating screen can improve screening efficiency, and screen size is depending on the material size grade of equipment sorting 's;Wet process Multilayer vibrating screen mainly plays screening and dehydration.
Further, in the step 5, -1+0.5mm particle size fraction the material feeds the sorting of diameter-verifying water medium sorting bed, The material size range of the diameter-verifying water medium sorting bed is 0.25~1mm, and processing capacity is 6~21kg/h;Water velocity is suitable Suitable adjustable range is 5.5~7.5m3/ h, bed body inclination angle are suitable for that adjustable range is 25 °~40 °, and delivery rate is suitable for adjustable range For 100~350g/min.
Present invention selection above parameter range, available preferable separating effect, the metal concentrate sorted Metal content is higher than 90%, and metal recovery rate is higher than 90%.
Further, in the step 5, -0.5+0.25mm particle size fraction the material feeds waterpower separation by shaking table, the water The material size range of power shaking table is 0~0.5mm, and processing capacity is 50~100kg/h;Stroke be suitable for adjustable range be 8~ 30mm, jig frequency are suitable for that adjustable range is 240~380 times/min, and cross fall is suitable for that adjustable range is 2.5 °~4.5 °, dense to mine Spending suitable adjustable range is 10%~30%.
Present invention selection above parameter range, available preferable separating effect, the metal concentrate sorted Metal content is higher than 85%, and metal recovery rate is higher than 90%.
Further, in the step 5, -0.074mm particle size fraction the material feeds Falcon centrifugal classifier, described The material size range of Falcon centrifugal classifier is 0~0.5mm, and processing capacity is 6~18kg/h;The water pressure that enters to recoil is suitable Adjustable range is 0.01~0.04MPa, and roller speed is suitable for that adjustable range is 30~50Hz, and feed thickness is suitable for adjusting model It encloses for 20~40g/L.
Present invention selection above parameter range, available preferable separating effect, the metal concentrate sorted Metal content is higher than 85%, and metal recovery rate is higher than 75%.
Further, in the step 5, -0.25+0.074mm particle size fraction the material feeds flotation device and is sorted, first It first carries out a reverse flotation and obtains nonmetallic enrichment body, secondary direct flotation then is carried out to the metal concentrate that sorting obtains, is obtained To copper concentrate and flotation tailing.
The present invention passes through a reverse flotation, available nonmetallic enrichment body;Secondary direct flotation is carried out to metal concentrate, Available copper concentrate;By the available three kinds of products of flotation twice in succession, i.e., nonmetallic enrichment body, copper concentrate and containing gold, Metals and its compound such as silver and zinc, improve product quality, obtain a greater variety of valuable components.
Further, the material size range of the flotation device is 0~0.25mm, and flotation cell volume is 1.5L, handles energy Power is 6~12kg/h;Wheel speed be suitable for adjustable range be 0~2600r/min, scraper plate revolving speed be suitable for adjustable range be 5~ 30r/min;Aeration quantity is suitable for that adjustable range is 100~600mL/ (m2Min), it is 20~30 that slurry temperature, which is suitable for adjustable range, DEG C, ore pulp mass concentration is suitable for that adjustable range is 100~200g/L.
The present invention selects above parameter range, available preferable separating effect, the metal richness that a reverse flotation obtains The metal content of collective is higher than 85%, and metal recovery rate is higher than 85%;The grade for the Copper in Concentrate that secondary flotation obtains is higher than 85%, the rate of recovery of copper is higher than 80%.
Further, the flotation tailing after secondary direct flotation is filtered, the flotation is then recycled using wet magnetic separation Magnetisable material in tailing, the magnetisable material mainly include iron, nickel;Using in acid leaching process and electrolysis method recycling magnetic tailing Silver;Using gold, platinum and the palladium in aqua regia dissolution's method and extraction recycling magnetic tailing;
Further, the metal concentrate sorted in step 6 is filtered, is then recycled using wet magnetic separator Magnetisable material therein, the magnetisable material mainly include iron, nickel;Using in acid leaching process and electrolysis method recycling metal concentrate Copper and silver;Using gold, platinum and the palladium in aqua regia dissolution's method and extraction recycling metal concentrate.
Further, the nonmetallic enrichment body sorted in the step 6 can be used for preparing modified pitch, as compound The packing material of material and heat treatment prepare active carbon and porous silicate.
The present invention has the beneficial effect that:
(1) present invention process is according to the chemical composition of waste printed circuit board, physical characteristic and metal enrichment situation, using more Metal component and nonmetallic ingredient in kind of physical separation technology separation different grain size grade material, obtained metal concentrate and non- The quality of metal concentrate product is higher, and the rate of recovery is higher, and assorting room is economic and environment-friendly;
(2) present invention uses wet split recovery process, effectively reduces the dirt of dust and toxic and harmful gas to environment Dye.
Other features and advantages of the present invention will illustrate in the following description, also, partial feature and advantage from It is become apparent in specification, or understand through the implementation of the invention.The objectives and other advantages of the invention can by Specifically noted structure is achieved and obtained in written specification, claims and attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing In, identical reference symbol indicates identical component.
Fig. 1 is the flow chart of the wet split recovery process of valuable component in waste printed circuit board of the present invention.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and Together with embodiments of the present invention for illustrating the principle of the present invention.
Embodiment 1
The wet split recovery process of valuable component in a kind of waste printed circuit board of the present invention, detailed process is as shown in Figure 1, originally Embodiment is as follows to the wet split recovery process of valuable component in discarded computer main board:
Step 1 disassembles discarded computer main board, the discarded computer main board bare board after being disassembled, the member under disassembling Device is classified by component and performance test process, respectively obtains recycling component, the high component of tenor And toxic, harmful component three classes;Recycling component is for the maintenance of used equipment and the production of new component;Metal is contained It measures high component and carries out smelting processing, recycle valuable metal therein;To toxic, harmful component according to solid waste dirt Contaminate the processing of the relevant laws and regulations such as environment anti-therapy;It is resistance, capacitor, electricity that the present embodiment, which discards the component that computer main board is disassembled, Sense, diode, transistor, relay, integrated circuit etc., it is whether intact by the function of multimeter detection these components, it will The intact component of function is classified as recycling component;Function is damaged and containing nocuousness such as polybrominated biphenyls, polychlorinated biphenyls The component of substance is classified as poisonous and harmful component;Some functions are damaged but higher component (such as slot of tenor The content of middle aluminium and copper is higher) it is classified as the high component of tenor;
Step 2 carries out removing solder processing to discarded computer main board bare board;Then successively to the obtained scruff of removing solder It is slightly refined and refining obtains solder that meet national standards;The present embodiment removes solder using heating quicksand method;
Step 3, using wet type bi-fluted roller type crusher and wet type impact-hammer type disintegrator to the discarded electricity after removing solder Brain mainboard bare board carries out wet process coarse crushing respectively and wet process is fine crushing, obtains discarded computer main board particle;Fragment after wet process coarse crushing Material granularity is less than 20mm, and broken material granularity after wet process is fine crushing is less than 1mm, eventually passes through two sections and broken obtain granularity and be less than The waste printed circuit board particle of 1mm;
Discarded computer main board particle after wet process is fine crushing is fed Wet multi-stage vibrating screen and sieve and divided by step 4 Grade obtains the material that particle size fraction is -1+0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm, each particle size fraction object The mass percent of material is respectively 35%, 15%, 27% and 23%;
The step 5, -1+0.5mm by after classification, -0.5+0.25mm and -0.074mm particle size fraction material successively feed variable diameter Aqueous medium sorting bed, waterpower shaking table and Falcon centrifugal classifier are sorted, and metal concentrate and nonmetallic richness are respectively obtained Collective;- 0.25+0.074mm particle size fraction material after classification is fed into flotation device, a reverse flotation is carried out, obtains nonmetallic gold Belong to enrichment body and metal concentrate;The metal concentrate that reverse flotation of -0.25+0.074mm particle size fraction material is obtained carries out Secondary direct flotation, obtains copper concentrate, and the flotation tailing after secondary direct flotation is filtered.
Step 6, the gold for sorting the circuit board materials of -1+0.5mm, -0.5+0.25mm and -0.074mm particle size fraction Belong to enrichment body to be recycled, by the circuit board of -1+0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm particle size fraction Obtained nonmetallic enrichment body is sorted to be recycled.
It is noted that the feed size range of the wet type bi-fluted roller type crusher used is 80~200mm, discharging-material size Range is 15~50mm, and discharging-material size range is adjusted by double teeth roller spacing, and material water ratio is allowed to be lower than 20%.The present embodiment Wet type bi-fluted roller type crusher is mainly made of the part such as motor, deceleration system, bearing, feeding inlet, discaling roll and rack, is worked When, rack-mounted motor and deceleration system are rotated by bearing drive drive roll, and drive roll passes through gear drive quilt Dynamic roller.Drive roll is identical with passive roll structure, and surface is distributed by straight tooth-shaped at groove profile.The straight-tooth of drive roll and passive guide roller is stung mutually Cooperation moves toward one another, when material is entered between two rollers by feeding inlet, under roller normal pressure, frictional force effect, by two The breaker roll moved toward one another is involved in crusher chamber, and material is cut into the fillet with straight-tooth similar width.Wet type bi-fluted roller type crusher The advantages of: the spacing of two tooth rods can be adjusted according to material thickness, hardness and treating capacity.Crusher during the present embodiment coarse crushing The volume of the water of middle addition accounts for the 20% of broken cavity volume.
It is noted that the fine crushing device used is wet type impact-hammer type disintegrator, feed size range is 10~40mm, Discharging-material size range is 0~3mm, and material water ratio is allowed to be lower than 25%.Wet type impact-hammer type disintegrator mainly by body, turn The part such as son, castor body and transmission device forms.When work, material equably feeds crusher chamber by loading hopper, and water flow passes through Filler pipe enters crusher chamber, and material is broken under the tup impact, shearing splitting effect of revolution at a high speed, meanwhile, material itself Gravity so that material is rushed at frame body Internal baffle, grating from high-speed rotating tup, be greater than screen size (1mm) material quilt Detention continues the strike and grinding by tup on sieve plate, and just passing through sieve plate until being crushed to required discharging-material size is discharged machine Outside.The volume for the water being added in crusher during the present embodiment is fine crushing accounts for the 30% of broken cavity volume.
It is noted that wet process vibration multi-layer grading sieve sieve screen size be successively from top to bottom 1mm, 0.5mm, 0.25mm and 0.074mm;The shake frequency of vibrating motor is suitable for that adjustable range is 900~1500 times/min, and amplitude is suitable for adjustable range For 4~8mm, vibrating direction angle is suitable for that adjustable range is 40 °~60 °;Screen material is woven wire cloth.
It is noted that diameter-verifying water medium sorting bed sorting -1+0.5mm particle size fraction material, diameter-verifying water medium sorting bed master It to be made of components such as batch meter, bed body, fluid distributor, filter bag, cyclic water tank and water pumps;It, will circulation with pump when work Water in water tank is injected within sorting bed body by bed body underflow opening, and recirculated water overflows and flow back into recirculated water by overflow pipe after bed body Case just forms the power water circulation system of a closure in this way;Then material feeds bed body by batch meter, using rotor stream Meter controls delivery rate, light-heavy material due to suffered in an aqueous medium gravity and buoyancy difference and transported along different tracks Dynamic, light material is moved along the motion profile of overflow water as light product, and heavy material along the direction of recirculation water along bed body Inner wall is slipped to bed body bottom as heavy product, to realize the separation of light-heavy material;Equipment design parameter is as follows, material size Range is 0.25~1mm, and processing capacity is 6~21kg/h;Diameter-verifying water medium sorting bed bed body base diameter is 200mm, bed body Base diameter is 120mm, bed height 800mm;Water velocity is suitable for that adjustable range is 5.5~7.5m3/ h, bed body inclination angle are suitable Suitable adjustable range is 25 °~40 °, and delivery rate is suitable for that adjustable range is 200~450g/min;The present embodiment pan feeding tenor It is 56.24%;When sorting, water velocity 6.3m3/ h, bed body inclination angle are 34 °, delivery rate 150g/min;Sorting obtains Metal concentrate metal content be 93%, metal recovery rate 94%.
It is noted that waterpower separation by shaking table -0.5+0.25mm particle size fraction material;Waterpower shaking table mainly by the head of a bed, motor, The components such as slope adjusting device, bed surface, feed launder, feed trough and riffling composition;When work, flushing water is fed by feed trough and is paved in cross To on inclined bed surface, uniform inclined-plane sheet flow is formed;When pulp density be 10%~30% material by feed launder from It flows on bed surface, ore particle loose, layering by the effect that water flow is rinsed and bed surface vibrates in riffling groove;Upper layer low-density mine Grain is located at the high density ore particle of bed bottom due to being moved downward by the biggish flushing ability of water flow along bed surface lateral inclination By bed surface differential motion and along bed surface longitudinal movement, be discharged by driving end opposite;Different densities and the ore particle of granularity are in bed surface On the horizontal and vertical effect that is subject to be different, thus their motion profile is also different, causes it fan-shaped on bed surface Distribution, the final separation for realizing high/low density material.Equipment design parameter is as follows, and material size range is 0~0.5mm, processing Ability is 50~100kg/h;Stroke is suitable for that adjustable range is 8~30mm, and jig frequency is suitable for that adjustable range is 240~380 times/min, Cross fall is suitable for that adjustable range is 2.5 °~4.5 °, and feed ore concentration is suitable for that adjustable range is 10%~30%;In the present embodiment Pan feeding tenor be 32.52%;When sorting, stroke 18mm, jig frequency is 300 times/min, and cross fall is 3.2 °, gives mine Concentration is 25%;The metal content for sorting obtained metal concentrate is 88%, metal recovery rate 92%.
It is noted that when using inflating mechanical agitation type flotation machine sorting -0.25+0.074mm particle size fraction material, mainly It is made of components such as base, groove body, mixing component, spindle unit, motor, frequency converter, flowmeter and control switches.When work, Motor drives main shaft rotation by motor pulley and spindle pulley, and impeller is rotated with main shaft, then in cover board and Parital vacuum area is formed between impeller, air is sucked by suction pipe through air collector, while ore pulp (concentration is 100~200g/L) is through inhaling Slurry pipe is inhaled into, and impeller guide vane of the centrifugal force through side edge thereof that rotation generates is borrowed to be got rid of into slot after the two mixing.Leaf The strong stirring of wheel makes the air-dispersion in ore pulp into bubble and is uniformly distributed in ore pulp, when the ore particle of suspension is in bubble hit When contact, the preferable ore particle of hydrophobicity, which is just attached on bubble and is brought by bubble, forms mineralized froth layer to liquid level, then by scraping Plate scrapes the ore particle being not attached on bubble as concentrate and stays in slot as tailing.Equipment design parameter is as follows, material size Range is 0~0.25mm, and processing capacity is 6~12kg/h;Wheel speed is suitable for that adjustable range is 0~2600r/min, and impeller is straight Diameter is 55mm, and scraper plate revolving speed is suitable for that adjustable range is 5~30r/min;Aeration quantity is suitable for that adjustable range is 100~600mL/ (m2Min), it is 20~30 DEG C that slurry temperature, which is suitable for adjustable range, and ore pulp mass concentration is suitable for that adjustable range is 100~200g/ L.A flotation in the present embodiment, pan feeding tenor are 18.35%;When sorting, wheel speed 1800r/min, scraper plate Revolving speed is 15r/min, and aeration quantity is 400mL/ (m2Min), slurry temperature is 25 DEG C, and ore pulp mass concentration is 150g/L;Make Kerosene consumption for collecting agent is 60g/t, and the terpenic oil dosage as foaming agent is 30g/t;The metal that first time flotation obtains The metal content for being enriched with body is 85%, metal recovery rate 87%;The pan feeding tenor of secondary flotation is 85%;When sorting, Wheel speed is 1800r/min, and scraper plate revolving speed is 15r/min, and aeration quantity is 400mL/ (m2Min), slurry temperature is 25 DEG C, Ore pulp mass concentration is 150g/L;Slurry pH is 3.9, and the double xanthate dosage as collecting agent is 80g/t, as foaming agent Terpenic oil dosage is 30g/t;The grade for the copper that secondary flotation obtains is 87%, and the rate of recovery of copper is 84%.
It is noted that when using Falcon centrifugal classifier sorting -0.074mm particle size fraction material, mainly by rotating cylinder, turn The components such as son, buffer board, glazing bar and feed pipe composition;When work, (concentration is 20~40g/L) by diversion pipe to material after sizing mixing Into after the interior cylinder bottom of rotation, rotating cylinder inwall is thrown to by centrifugal force, meanwhile, the back-flushing with certain pressure is from inside and outside Water jacket between rotating cylinder flows vertically through the inlet opening on inner wall, makes to sink into material loosening or fluidization between reflex circle.? Under the collective effect of centrifugal force and back-flushing, the big material of the small density of granularity can overcome the Radial resistant force of back-flushing and be centrifuged it is heavy Drop or brill gap permeate material bed gap and arrive at cone wall, even very fine high density material can also penetrate bed, and it is close Lesser material is spent because suffered centrifugal force is smaller, in addition being difficult to overcome the effect of back-flushing, finally in the impulse force of axial water flow Under the collective effect of the axial thrust load of centrifugal force, screwing out interior rotating cylinder becomes product from failing.Shutting down and interrupting feed water supply Intermittently, interior rotating cylinder is unloaded, wherein heavy product will pour concentrate slot as concentrate product.Equipment design parameter is as follows, material size Range is 0~0.5mm, and processing capacity is 6~18kg/h;The water pressure that enters to recoil is suitable for that adjustable range is 0.01~0.04MPa, rolling Cylinder speed is suitable for that adjustable range is 30~50Hz, and feed thickness is suitable for that adjustable range is 20~40g/L.In the present embodiment Pan feeding tenor is 4.5%;When sorting, recoil water pressure is 0.03MPa, and roller speed is 35Hz, and feed thickness is 30g/L;The metal content for sorting obtained metal concentrate is 86%, metal recovery rate 76%.
It is noted that the flotation tailing (containing metals such as gold, silver and zinc) that the present embodiment obtains secondary direct flotation carries out Then filtering recycles magnetisable material iron, nickel in the flotation tailing etc. using wet magnetic separation;It is returned using acid leaching process and electrolysis method Receive the silver in magnetic tailing;Using gold, platinum and the palladium in aqua regia dissolution's method and extraction recycling magnetic tailing.
It is noted that the present embodiment obtains sorting -1+0.5mm, -0.5+0.25mm and -0.074mm particle size fraction material Metal concentrate be filtered, magnetisable material iron therein, nickel etc. are then recycled using wet magnetic separation;Using acid leaching process and Electrolysis method recycles the copper and silver in magnetic tailing;Using gold, platinum and the palladium in aqua regia dissolution's method and extraction recycling magnetic tailing;
It is noted that the nonmetallic enrichment body being recovered to is used to prepare modified pitch, as composite wood by the present embodiment The packing material of material, heat treatment prepare active carbon and porous silicate.
In conclusion the present invention provides a kind of wet split recovery process of valuable component in waste printed circuit board, this hair Bright technique is according to the chemical composition of waste printed circuit board, physical characteristic and metal enrichment situation, using a variety of physical separation technologies Separate the metal component and nonmetallic ingredient in different grain size grade material, obtained metal concentrate and nonmetallic rich group product Quality it is higher, the rate of recovery is higher, and assorting room is economic and environment-friendly, avoids the broken and dust pollution in assorting room and has The evolution of malicious pernicious gas.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art, It should be covered by the protection scope of the present invention.

Claims (9)

1. the wet split recovery process of valuable component in a kind of waste printed circuit board, which is characterized in that mainly comprise the steps that
Step 1 disassembles waste printed circuit board, the waste printed circuit board bare board after being disassembled;
Step 2 carries out removing solder to waste printed circuit board bare board;
Step 3 will remove the waste printed circuit board bare board after solder and successively carry out wet process coarse crushing and wet process is fine crushing, obtain discarded circuit Plate particle;
Waste printed circuit board particle is fed Wet multi-stage vibrating screen progress sieve classification by step 4, and obtaining particle size fraction is -1+ The material of 0.5mm, -0.5+0.25mm, -0.25+0.074mm and -0.074mm;
Particle size fraction is fed diameter-verifying water medium point for the material of -1+0.5mm, -0.5+0.25mm and -0.074mm by step 5 respectively Bed, waterpower shaking table and Falcon centrifugal classifier is selected to be sorted;The material that particle size fraction is -0.25+0.074mm is fed into flotation Machine is sorted;It is sorted, respectively obtain metal concentrate and nonmetallic enrichment body;
Step 6 recycles metal concentrate that each equipment sorts and nonmetallic enrichment body respectively;
In the step 5, -1+0.5mm particle size fraction the material feeds the sorting of diameter-verifying water medium sorting bed, the diameter-verifying water medium The material size range of sorting bed is 0.25~1mm, and processing capacity is 6~21kg/h;Water velocity adjustable range be 5.5~ 7.5m3/ h, bed body tilt adjustment range are 25o~40o, and delivery rate adjustable range is 100~350g/min;
- 0.5+0.25mm particle size fraction the material feeds waterpower separation by shaking table, and the material size range of the waterpower shaking table is 0~ 0.5mm, processing capacity are 50~100kg/h;Stroke adjustable range be 8~30mm, jig frequency adjustable range be 240~380 times/ Min, cross fall adjustable range are 2.5 °~4.5 °, and feed ore concentration adjustable range is 10%~30%;
- 0.074mm particle size fraction the material feeds Falcon centrifugal classifier, the material size of the Falcon centrifugal classifier Range is 0~0.5mm, and processing capacity is 6~18kg/h;Entering back-flushing pressure regulation spectrum is 0.01~0.04MPa, roller rotation Turning frequency-tuning range is 30~50Hz, and feed thickness adjustable range is 20~40g/L;
- 0.25+0.074mm particle size fraction the material feeds flotation device and is sorted, and carries out a reverse flotation first and obtains non-gold Belong to enrichment body, secondary direct flotation then is carried out to the metal concentrate that sorting obtains, obtains copper concentrate and flotation tailing.
2. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 1 In the component for being disassembled waste printed circuit board in the step 1 passes sequentially through component classification, the inspection of component performance It surveys and carries out classification processing;In the step 2, the scruff obtained to removing solder is successively slightly refined and is refined, and obtains solder.
3. the wet split recovery process of valuable component, feature in a kind of waste printed circuit board according to claim 1 or 2 It is, in the step 3, using wet type bi-fluted roller type crusher and wet type impact-hammer type disintegrator to discarded after removing solder Circuit board bare board successively carries out wet process coarse crushing and wet process is fine crushing.
4. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 3 In the waste printed circuit board grain diameter obtained after the wet process coarse crushing is less than 20mm, the discarded electricity obtained after the wet process is fine crushing Road plate grain diameter is less than 1mm.
5. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 4 In in the step 3, the volume for the water being added during wet process coarse crushing accounts for wet type bi-fluted roller type crushing chamber of crusher volume 10%~20%, wet process it is fine crushing during be added water volume account for wet type beater type crushing chamber of crusher volume 20%~ 30%.
6. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 5 In, in the step 4, the screen size of the Wet multi-stage vibrating screen be successively from top to bottom 1mm, 0.5mm, 0.25mm and 0.074mm;The shake frequency adjustable range of vibrating motor is 900~1500 times/min in the Wet multi-stage vibrating screen, and amplitude is adjusted Range is 4~8mm, and vibrating direction angle adjustable range is 40 °~60 °.
7. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 1 In the material size range of the flotation device is 0~0.5mm, and flotation cell volume is 1.5L, and processing capacity is 6~12kg/h;Leaf Wheel speed adjustable range is 0~2600r/min, and scraper plate rotational speed regulation range is 5~30r/min;Aeration quantity adjustable range is 100 ~600mL/ (m2Min), slurry temperature adjustable range is 20~30 DEG C, and ore pulp mass concentration adjustable range is 100~200g/ L。
8. the wet split recovery process of valuable component, feature exist in a kind of waste printed circuit board according to claim 7 In being filtered to the flotation tailing after secondary direct flotation, then recycle the magnetic material in the flotation tailing using wet magnetic separation Matter;Using the silver in acid leaching process and electrolysis method recycling magnetic tailing;Magnetic tailing is recycled using aqua regia dissolution's method and extraction In gold, platinum and palladium.
9. the wet split recovery process of valuable component, the step 6 in a kind of waste printed circuit board according to claim 8 The middle obtained nonmetallic enrichment body that sorts can be used for preparing modified pitch, the packing material as composite material and heat treatment preparation Active carbon and porous silicate.
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